Handbook of Equine Parasite Control

Craig R. Reinemeyer graduated from the Ohio State University College of Veterinary Medicine in 1976, and spent 5 years in mixed animal practice before returning to OSU to pursue a PhD in veterinary parasitology. He was a faculty member of the University of Tennessee College of Veterinary Medicine from 1984 to 1998, and served as the President of the American Association of Veterinary Parasitologists from 2003 to 2004. In 1997, Dr. Reinemeyer founded East Tennessee Clinical Research, a contract research organization that conducts pharmaceutical studies to facilitate the development of new veterinary drugs. ETCR's efforts have contributed to the approval of several currently marketed anthelmintics for horses, cattle, and pets.

Martin K. Nielsen is Assistant Professor in the Department of Veterinary Science of the Maxwell H. Gluck Equine Research Center at the University of Kentucky. He has a doctorate from the University of Copenhagen, and was a faculty member there for four years before moving to Kentucky. His research interests include endoparasite infections of horses, clinical and molecular diagnosis, epidemiology, surveillance, and control.

Preface vii Acknowledgments ix

SECTION I Internal Parasites and Factors Affecting Their Transmission 1 1 Biology and Life Cycles of Equine Parasites 3 2 Pathology of Parasitism and Impact on Performance 24 3 Environmental Factors Affecting Parasite Transmission 45 4 Host Factors Affecting Parasite Transmission 53 5 Parasite Factors Affecting Transmission 58

SECTION II Principles of Equine Parasite Control 67 6 Decreasing Parasite Transmission by Nonchemical Means 69 7 Pharmaceutical Approaches to Parasite Control 80

SECTION III Diagnosis and Assessment of Parasitologic Information 101 8 Diagnostic Techniques for Equine Parasitism 103 9 Detection of Anthelmintic Resistance 128 10 Evaluating Historical Information 138 11 Synopsis of Evidence-Based Parasite Control 145

SECTION IV Case Histories 153 Case 1 Mystery Drug 155 Case 2 Pyrantel Efficacy Evaluation 158 Case 3 Egg Count Results From Illinois Yearlings 160 Case 4 Colic and Parasites 163 Case 5 Confinement after Deworming 166 Case 6 Abdominal Distress in a Foal 168 Case 7 Quarantining Advice 171 Case 8 Diarrhea and Colic 173 Case 9 Foal Diarrhea 176 Case 10 Oral Lesion 179 Case 11 Skin Lesion 181 Case 12 Legal Case 184 Case 13 Repeated Egg Counts 186 Case 14 Repeated Colic 189 Case 15 Ivermectin Efficacy 193 Case 16 Ten Commandments 195 Case 17 Ivermectin Egg Reappearance 198 Case 18 Name that Worm 201 Case 19 Parasite Control for Yearlings 203 Case 20 Reaction to Treatment 205 Index 207

"This text (handbook) is fantastic. Very thorough, I see where they encompassed many decades of information that is science based and also extremely practical. I see a tremendous amount of Dr. R's knowledge and style here, again both scientific and practical included in this text. Extremely easy to read and very concise concerning what information equine vets need and should know about equine parasites and the management and use of current dewormers combined with management strategies. Ton more in here than" just deworm your horse every 2 months!." (Steven Grubbs of Boehringer Ingelheim)